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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)		3 Months Ended		9 Months Ended
	Nov. 09, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)				1,216,149	0
Income Tax Expense (Benefit), Total		$ 0	$ 0	$ 0	$ 0
Cash Equivalents, at Carrying Value, Total		0		0		$ 0
Cash, Uninsured Amount		0		0		331,385
Restricted Cash, Total		0		0		5,000,000
Accounts Receivable, Allowance for Credit Loss, Current		$ 0		$ 0		$ 0
Number of Finite-Lived Intangible Assets		2		2
Impairment of Intangible Assets (Excluding Goodwill), Total				$ 0	$ 0
Customer Base [Member]
Finite-Lived Intangible Asset, Useful Life (Year)				20 years
Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life (Year)				3 years
Domestic Tax Authority [Member]
Operating Loss Carryforwards		$ 197,800,000		$ 197,800,000
Operating Loss Carryforwards, Amount Subject to Expiration		140,600,000		140,600,000
Operating Loss Carryforwards, Amount Not Subject to Expiration		57,200,000		57,200,000
Tax Credit Carryforward, Amount		4,300,000		4,300,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards		112,200,000		112,200,000
Tax Credit Carryforward, Amount		$ 300,000		$ 300,000
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)				60,066
The Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)		3,597,557		3,597,557
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)				116,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)		2,186,964		2,186,964
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares)	3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)				10 years
The Plan [Member] \| Share-Based Payment Arrangement, Option [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)		1,234,527		1,234,527
The Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)		60,066		60,066
The ESPP [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)		1,025,000		1,025,000
Percentage of Common Stock Outstanding of Preceding Year				10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Limited Per Year (in shares)		100,000		100,000
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate		15.00%		15.00%
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date				85.00%